ハライソの灯

That is the name of the high class officially sanctioned brothel at the back of the red-light district that is run by an irresponsible man.

The girl who collapsed in the rain (Tsuzura) is saved by that brothel owner, but somehow she has no memories.

While she is trembling with anxiety the owner gives her an offer to work in his establishment. Without any other purpose in life the girl accepts.

Inside that inexplicably logically run red-light district, that pure white girl slowly becomes stained, and so she receives everything.

Attending to others bodies, It's only a matter of time before she changes inside, what in the world should she choose?

That everything is, inside the girl, inside Tsuzuru's body.

(Translated from the official site)